4′33″

4′33″ is a modernist composition by American experimental composer John Cage. It was composed in 1952 for any instrument or combination of instruments; the score instructs performers not to play their instruments throughout the three movements. It is divided into three movements, lasting 30 seconds, 2 minutes and 23 seconds, and 1 minute and 40 seconds, respectively, although Cage later stated that the movements' durations can be determined by the musician. As suggested by the title, the composition lasts 4 minutes and 33 seconds. It is marked by silence except for ambient sound, which is intended to contribute to the performance.

4′33″ was conceived around 1947–48, while Cage was working on the piano cycle Sonatas and Interludes. Many prior musical pieces were largely composed of silence, and silence played a notable role in his prior work, including Sonatas and Interludes. His studies on Zen Buddhism during the late 1940s about chance music led him to acknowledge the value of silence in providing an opportunity to reflect on one's surroundings and psyche. Recent developments in contemporary art also bolstered Cage's understanding on silence, which he increasingly began to perceive as impossible after Rauschenberg's White Painting was first displayed.

4′33″ premiered in 1952 and was met with shock and widespread controversy; many musicologists revisited the very definition of music and questioned whether Cage's work qualified as such.